An Underwater Acoustic Implementation of DFT-Spread OFDM

被引:9
|
作者
Zhang, Yonghuai [1 ]
Sun, Haixin [1 ]
Cheng, En [1 ]
Shen, Weijie [1 ]
机构
[1] Xiamen Univ, Key Lab Underwater Acoust Commun & Marine Informa, Xiamen 361005, Fujian, Peoples R China
关键词
Orthogonal Frequency Division Multiplex; Channel Estimation; Channel State Information; Orthogonal Frequency Division Multiplex System; Power Ratio;
D O I
10.1155/2010/572453
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
This paper presents a design of DFT-spread OFDM system applied to an underwater acoustic channel. It does not only combine all the advantages of a conventional OFDM system but also reduces the peak-to-average power ratio of the transmit signal. Besides, the scheme spreads the information over several subcarriers as a result of the application of an additional DFT operation and leads to a diversity gain in a frequency-selective fading channel, which is one of the many challenges of communicating data through an underwater acoustic channel. Simulation results show that our proposal possesses good bit-error-rate performance. The system has been tested in a real underwater acoustic channel-the experimental pool in Xiamen University. The experimental results show that the DFT-spread OFDM system can achieve better results than a simple OFDM system in a benign underwater channel.
引用
收藏
页数:6
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